The application provides a solar cell, a manufacturing method, a photovoltaic device and a photovoltaic system. The solar cell includes a substrate, a doped conducting layer, a first passivation layer, an anti-reflection layer, a passivation contact layer, and a second passivation layer. The substrate includes opposite first and second surfaces, and side surfaces between the first and second surfaces. The doped conducting layer and the first passivation layer are sequentially stacked on the first surface. The anti-reflection layer is stacked on the first passivation layer and covers the first surface to cover the first passivation layer. The passivation contact layer is stacked on the second surface. The second passivation layer is stacked on the passivation contact layer and covers the second surface to cover the passivation contact layer. The anti-reflection layer or the second passivation layer covers at least part of at least one side surface of the substrate.

A spatial structure of a photovoltaic module or of a concentrator of solar radiation includes a base body having an upper truncated pyramid or cone arranged on a lower truncated pyramid or cone. An area of a bottom base of the upper truncated pyramid or cone is smaller than an area of a top base of the lower truncated pyramid or cone. An inclination angle of the lower and upper truncated pyramid or cone is in a range of 60 to 85. At least one pyramid-shaped or cone-shaped concentration projection is arranged on one or both of: the top base of the lower truncated pyramid or cone or a top base of the upper truncated pyramid or cone, wherein the inclination angle of the concentration projection is in a range of 20 to 55.

A spatial structure of a photovoltaic module or of a concentrator of solar radiation includes a base body having an upper truncated pyramid or cone arranged on a lower truncated pyramid or cone. An area of a bottom base of the upper truncated pyramid or cone is smaller than an area of a top base of the lower truncated pyramid or cone. An inclination angle of the lower and upper truncated pyramid or cone is in a range of 60 to 85. At least one pyramid-shaped or cone-shaped concentration projection is arranged on one or both of: the top base of the lower truncated pyramid or cone or a top base of the upper truncated pyramid or cone, wherein the inclination angle of the concentration projection is in a range of 20 to 55.

A solar cell includes: a substrate including a first surface and a second surface arranged opposite to each other and a plurality of lateral surfaces adjacent to and located between the first surface and the second surface; a plurality of pyramid base shaped textured structures being constructed on the second surface and each of the lateral surfaces, wherein a minimum side length of each of top surfaces of the pyramid base shaped textured structures arranged on the lateral surfaces is L1, a maximum side length of each of top surfaces of the pyramid base shaped textured structures arranged on the second surface is L2, and L1>L2; a doped conductive layer arranged on the first surface; and a passivated contact layer including a polysilicon doped conductive layer, the passivated contact layer being arranged on the second surface.

A heterojunction battery, a preparation method therefor, and an application thereof are provided. The heterojunction battery includes a substrate, a first intrinsic amorphous silicon layer, an N-type doped amorphous silicon layer or microcrystalline silicon layer or nanocrystalline silicon layer, a first transparent conductive oxide layer, a second intrinsic amorphous silicon layer, a P-type doped amorphous silicon layer or microcrystalline silicon layer or nanocrystalline silicon layer, a second transparent conductive oxide layer, and a dielectric film. The heterojunction battery further includes a metal mesh. The metal mesh penetrates through the dielectric film and is fixedly connected to the first transparent conductive oxide layer and the second transparent conductive oxide layer, respectively. The metal mesh is composed of multiple first metal wires and multiple second metal wires. The first metal wires are perpendicular to the second metal wires.

A photovoltaic cell is provided, including a substrate having a front surface with metal pattern regions and a rear surface, first pyramid structures in each metal pattern region, platform protrusion structures on the rear surface, a first tunneling layer and a first doped conductive layer on a portion of the front surface in a respective metal pattern region, and a second tunneling layer and a second doped conductive layer on the rear surface. A height of each first pyramid structure is greater than that of each platform protrusion structure. A one-dimensional dimension of a bottom portion of each first pyramid structure is less than that of each platform protrusion structure. A doping element type of the first doped conductive layer is the same as that of the substrate. A doping element type of the second doped conductive layer is different from that of the first doped conductive layer.

Disclosed are a photovoltaic cell, a method for producing the same and a photovoltaic module. The method includes providing a silicon wafer; forming a tunneling oxide layer on the silicon wafer and a P-type amorphous silicon layer over the tunneling oxide layer; forming N-type dopants on the P-type amorphous silicon layer; performing laser processing on the N-type dopants to cause the P-type amorphous silicon layer to be converted into an amorphous silicon layer having alternatingly arranged P-type amorphous silicon and N-type amorphous silicon; removing the N-type dopant on the amorphous silicon layer and forming a protective layer over the amorphous silicon layer; performing processing on the protective layer and the amorphous silicon layer to form a groove and a protrusion; subjecting the silicon wafer to further processing to increase a depth of the groove; removing the protective layer; and subjecting the silicon wafer to high temperature processing.

A luminescent solar concentrator including a light propagation device, one or more photovoltaic cells, and one or more waveguides is provided. The light propagation device includes a plurality of nanostructures configured to permit preferential propagation of a wavelength range of light in one direction. The one or more photovoltaic cells are positioned adjacent an end of the light propagation device. The one or more waveguides are configured to guide light toward the one or more photovoltaic cells via total internal reflection within the luminescent solar concentrator.

Provided are a solar cell, a method for preparing a solar cell, and a photovoltaic module, relating to the field of photovoltaics. The solar cell includes a substrate, a dielectric layer and a doped semiconductor layer which are stacked, a passivation layer, and electrodes. The substrate has a first surface. The first surface includes an edge region and a center region. The edge region surrounds the center region. The edge region is substantially flush with or closer to the second surface than the center region. The dielectric layer is formed over the center region. The passivation layer covers the edge region and a surface of the doped semiconductor layer facing away the dielectric layer. The electrodes are located in the center region, and penetrate the passivation layer in a thickness direction to be in electrical contact with the doped semiconductor layer.

The present application provides implementations relating to a solar cell, a preparation method therefor, and a photovoltaic module, and relates to the field of photovoltaic technologies. In an implementation, a solar cell includes a silicon substrate, a front-side passivation anti-reflection layer located on a light-facing side of the silicon substrate, and a back-side passivation anti-reflection layer located on a back side of the silicon substrate. The silicon substrate includes a light-facing surface and a back surface. The light-facing surface of the silicon substrate includes a first textured structure, and at least a part of regions of the back surface of the silicon substrate includes a second textured structure. Apex angles of the second textured structure are greater than apex angles of the first textured structure.